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Computed Tomography Algorithms for Helical Scanned Data

Award Information
Agency: Department of Defense
Branch: Army
Contract: N/A
Agency Tracking Number: 36786
Amount: $743,098.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Solicitation Year: N/A
Award Year: 1997
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
5400 Port Royal Rd
Springfield, VA 22151
United States
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 John L. Perry
 (703) 321-9000
Business Contact
Phone: () -
Research Institution

The revolution in digital processor and memory technology is making it feasible to execute Computed Tomography, CT, at much higher rates. Use of multiple fixed sources eliminates the rate limitation of mechanical scanning. The final limit to accurate CT scanning of objects in rapid continuous motion is artifacts produced by different projection planes through the object. Methods of minimizing the effects of plane offsets are defined. They include interpolation between sequential scans and maximum likelihood weighting to maximize the consistency of the reconstruction. The improvement of these techniques over straightforward reconstruction of projections in differing planes will be quantified. An Algebraic Reconstruction Technique is used that can accommodate any source-detector geometry. X-rays are the most common method of noninvasive internal inspection. Rapid, economical, accurate CT scanning will greatly facilitate all types of X-ray inspection now used and make many more feasible. Some examples are parts and assembly inspection, inspection of injection molds, and composite materials for voids, and inspection of machines, plumbing and pressure vessels, and bulk materials for cracks, voids, or adulteration.

* Information listed above is at the time of submission. *

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